Framing and miter gage



J. H. KNIGHT.

FRAMING AND MITER GAGE.

APPLICATION FILED 050.12.1919.

Patented Nov. 22, 1921.

2 SHEETS-SHEET1.

1 J/IMFS #4611515 4 /6777 J; H. KNIGHT.

FRAMING AND MITER GAGE.

APPLICATION FILED DEC-12, I919.

Patented Nov. 22, 1921..

2 SHEETSSHEET 2.

PATENT orrics.

JAMES HARMER KNIGHT, OF WEST'LO'WN,v PENNSYLVANIA.

FRAMING AND Mirna GAGE.

Application filed December 12, 1919.

ToaZZ whom it may concern: Be it known that 1, James Hanan; KNIoI-Ina citizen of the United States, residing at lVesttown, in the county of Chester and State of Pennsylvania, have invented certain new and useful Improvements; in Framing and Miter Gages, of which the following is a specification.

This invention provides a gage which. facilitates the work of framing in the erection of wooden buildings, since it gives proper direction to the saw when making cuts at different angles. The invention enables a skilled mechanic to start a cut which may be subsequently finished by unskilled labor, thereby minimizingthe cost of labor and enabling the work to be advanced rapidly.

The drawings illustrate a preferred embodiment of the invention. However, it is to be understood that in adapting the same to meet different conditions, various changes in the form, proportion and minor details of construction may be resorted to without departing from the nature of the invention as claimed hereinafter.

Referring to the accompanying drawings:

Figure 1 is a top plan view of a miter gage embodying the invention showing the same in operative position.

Fig. 2 is a side view of the gage, the saw being in section.

I Fig. 3 is afront view of the gage and parts illustrated in Fig. 1.

Fig. 4 is a top plan view of a modified form of gage.

Fig. 5 is a side view of the modification.

Fig. 6 is a front view of the gage, an intermediate portion being broken away.

Fig. 7 is a detail view in elevation of the upper portion of the frame showing more clearly the adjusting mechanism for controling the feed of the saw.

Fig. 8 is a detail view of the saw holder or clamp.

Fig. 9 is a sectional detail on the line 99 of Fig. 5.

Fig. 10 is a detail section on the line 10-10 of Fig. 3.

Corresponding and like parts are referred to in the following description and inclicated in the several views of the drawings by like reference characters.

The device comprises essentially a frame, a pivoted arm and saw supporting and guiding devices. The frame consists of a base 1 Specification of Letters Patent.

Patented Nov. 22, 1921.

Serial No. 344,442.

and an upright 2. These parts may be relatlvely fixed as shown in Figs. 1, 2 and 3 or pivotally connected as indicated in Figs. 4, 5 and 6. In the construction shown in Figs. 1, 2 and 3, a brace 3 connects the parts 1 and 2 and the construction is such that the saw cuts in a plane perpendicular to the base. In the arrangement illustrated in Figs. 4, 5 and 6, the saw is adapted to cut at any given angle within the range of adjustment of the upright 2. An arm 1 is pivotally connected to the base 1 at 5 and its outer end is provided with a clamp 6 whereby it may be secured to the base in an adjusted position. The outer edge of the base 1 is formed on the arc of a circle whose center coincides with. the pivot 5 of the arm 4: and is beveled to be engaged by the jaw of the clamp which is adapted to bindingly engage the beveled edge so as to secure the arm in the adjusted position. When the arm 4 is adjusted so as to stand at a right angle to the plane of the upright .2, the gage is set for cutting square across the work. The outer edge of the base 1 is calibrated, the zero of the scale being positioned to register with an indicating mark on the arm 1 when the latter is adjusted. at a right angle to the plane of the upright 2. This is indicated most clearly in Figs. 1 and 4E. The scale extends in each direction from the zero mark so that the arm may be adjusted to the right or to the left of a normal position.

Guides 7 are provided upon the outer face of the upright 2 and receive slides 8 which constitute carriers since they receive and support the saw 9. Each of the guides 7 consists of a casing which is attached at its inner vertical edge to the upright 2. The carriers 8 are slidably mounted in the guides 7. The carriers 8 are adapted to be limited in their downward movement so as to regulate the depth of action of the saw and thereby insure the several cuts being of uniform depth. Vertical slots 10 are formed in opposite sides of each of the guides 7. Corresponding vertical slots 11 are formed in the carriers 8 in position to register with the slots 10. The slots 10 and 11 have cuts opening downwardly therefrom to receive the blade of the saw 9. The saw adapted for use with the gage is of the type reinforced along its back and known as a tenon or back saw. The slots 10 and 1.1 are of a width corresponding to the thickness of the back of the saw as shown most clearly in Figs. 2

depth of the cut thereby insuring that'the several cuts will be of uniform depth. The upright 2 is cut away near each vertical edge near the top thereof as indicated at 12 and receives a screw 13. i A nut 1e mounted on each of the screws 13 is adapted to engage a notch 15 in the inner vertical edge of the slide or carrier 8. It will thus be understood that adjustment of the nuts 14 on the screws 18 enables the position of the carriers 8 to be relatively fixed whereby to determine the limit of the downward movement of the saw. The guides 7 are cut away at their inner vertical edges as indicated at 16 so as to provide clearance for the edge of the nut 14 engaging the carrier 8.

The saw is yieldably supported by means of a holder 17 and contractile helical springs 18. The holder 1? is adapted to engage the back of the saw and is of such construction as to be readily engaged with or disengaged therefrom. The springs 18 extend from opposite sides of the holder 17 and connect with the guides 7. The springs 18 may be of such tension as to support the saw clear of the work and enable the saw to be advanced by the application of pressure thereto when in operation. 7

The only material difference in the forms shown in Figs. 1 and 4 is that the parts 1 and 2 are relatively fixed in the construction illustrated in Fig. 1 and are pivotally connected in the construction delineated in Fig. 4:. In the modification, a plate 19 is provided at one edge of the upright 2 and is relatively fixed. The outer edge of the plate 19 is formed on the arc of a circle whose center coincides with the point of contact of the saw 9 with the work as indicated at 20 in Fig. 5. The outer edge of the plate 19 is calibrated in substantially the same manner as the base 1 so that the uprights 2, may be adjusted'to the right or to the left of a given or normal position which is perpendicular to the base. Suitable clamping means 21 are provided for securing the upright 2 in the required adjusted position.

When the upright is in normal position or in a plane perpendicular to the base, the saw 9 is adapted to form a cut at a right angle to the upper face of the work. If the cut is to be outwardly inclined the upright 2 is adjusted to the left ot-a perpendici lar line. If the cut is to be inclined inwardly the upright 52 is inclined outwardly or to the rightof a line perpendicular to the base. The adjustment of the uprights in either direction is determined by the calibrations on the plate 19 and said upright is secured to the adjusted position by the clamp means.

Having thus fully described my invention what T claim as new and desire to secure by Letters Patent, is: V

'In a gage of the. class described, a frame, guide casings arranged in spacedrelation vertically on the frame, saw carrying slides each mounted in a respective casing and movable vertically therein the casings and slides being correspondingly slotted to. receive and support a saw passing therethrough, vertical screws each fixed y mounted on the frame adjacent a respective casing, and thumb nuts each mounted on one of said screws, said slides having notches at their upper ends engaging respective nuts, said nuts eing independently. revoluble whereby to etlect independent adjustment of the respective slides.

In testimony whereof I my signature in presence of two witnesses.

JAMES HARMER KNIGHT.

Witnesses PERCY MoGnonon, HAROLD E. BIRD. 

